//
// PathMapper
//
// Copyright (C) jextra.net.
//
//  This file is part of the Crack build system.
//
//  The Crack build system is free software; you can redistribute it 
//  and/or modify it under the terms of the GNU Lesser General Public
//  License as published by the Free Software Foundation; either
//  version 2.1 of the License, or (at your option) any later version.
//
//  The Crack build system is distributed in the hope that it will be 
//  useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//  Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with the Crack build system; if not, write to the Free
//  Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
//  02111-1307 USA.
//

package net.jextra.crackupdaterweb;

import javax.servlet.http.*;

/**
 * Convert an HTTP request URL into an updater path.
 */
public class PathMapper
{
    // ============================================================
    // Fields
    // ============================================================

    private String _path;

    // ============================================================
    // Constructors
    // ============================================================

    public PathMapper( HttpServletRequest request )
    {
        this( request.getServletPath() );
    }

    public PathMapper( String servletPath )
    {
        _path = servletPath;

        // Throw away prefixed /.
        if ( _path.startsWith( "/" ) )
        {
            _path = _path.substring( 1 );
        }

        // Throw away the "action".
        int slash = _path.indexOf( '/' );
        if ( slash >= 0 )
        {
            _path = _path.substring( slash + 1 );
        }
        else
        {
            _path = "";
        }

        String[] strings = _path.split( "/" );

        StringBuilder builder = new StringBuilder();
        for ( int i = 0; i < strings.length; i++ )
        {
            if ( builder.length() > 0 )
            {
                builder.append( "/" );
            }
            builder.append( strings[i] );
        }
        _path = builder.toString();
    }

    // ============================================================
    // Methods
    // ============================================================

    // ----------
    // public
    // ----------

    public String getPath()
    {
        return _path;
    }
}

